module.exports = function (db, callback) {
  // 用户模型
  db.define("AttributeModel", {
    attr_id: { type: 'serial', key: true },
    attr_name: String,
    cat_id: Number,
    attr_sel: ["only", "many"],	// only:输入框(唯一)  many:后台下拉列表/前台单选框
    attr_write: ["manual", "list"],	// manual:手工录入  list:从列表选择
    attr_vals: String,
    delete_time: Number
  }, {
    table: "sp_attribute"
  });
  return callback();
}